Set of 3 Laundry Magnesium The rectangular one is unused. The Laundry Mag-chan has been used quite a bit. Each Laundry Mag-chan is about 50g. The rectangular one is 100g. There is a total of 200g. The smaller one is unopened, but according to the Laundry Mag-chan official website, the amount is 50g, so the amount itself hasn't decreased much. However, the Laundry Mag-chan case itself is torn at the edges and worn, showing signs of use. The granules of the larger one are about 5mm in size.